Creep-assisted slow crack growth in bio-inspired dental multilayers

Journal of the Mechanical Behavior of Biomedical Materials
Jing DuWole Soboyejo

Abstract

Ceramic crown structures under occlusal contact are often idealized as flat multilayered structures that are deformed under Hertzian contact loading. Previous models treated each layer as linear elastic materials and resulted in differences between the measured and predicted critical loads. This paper examines the combined effects of creep (in the adhesive and substrate layers) and creep-assisted slow crack growth (in the ceramic layer) on the contact-induced deformation of bio-inspired, functionally graded multilayer (FGM) structures and the conventional tri-layers. The time-dependent moduli of each of the layers were determined from constant load creep tests. The resulting modulus-time characteristics were modeled using Prony series. These were then incorporated into a finite element model for the computation of stress distributions in the sub-surface regions of the top ceramic layer, in which sub-surface radial cracks, are observed as the clinical failure mode. The time-dependent stresses are incorporated into a slow crack growth (SCG) model that is used to predict the critical loads of the dental multilayers under Hertzian contact loading. The predicted loading rate dependence of the critical loads is shown to be consistent...Continue Reading

References

Nov 15, 2000·Journal of Biomedical Materials Research·G W MarshallS J Marshall
Feb 14, 2004·Biomaterials·Brian R LawnVan P Thompson
Sep 16, 2004·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Yu ZhangBrian R Lawn
Jan 4, 2007·Journal of Materials Science. Materials in Medicine·Dianne Rekow, Van P Thompson
Jan 4, 2007·Journal of Materials Science. Materials in Medicine·M HuangW O Soboyejo
Jan 4, 2007·Journal of Materials Science. Materials in Medicine·M HuangW O Soboyejo
Jan 25, 2007·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·J ZhouW O Soboyejo
Sep 1, 2009·Journal of the Mechanical Behavior of Biomedical Materials·Xinrui NiuWole Soboyejo

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Citations

Jan 19, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Fatma A ShembishYu Zhang
Oct 23, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Haifa El ZhawiYu Zhang
Aug 1, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Liliana PorojanSorin-Daniel Porojan
Nov 19, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·K C ArchangeloA L S Borges
Jun 20, 2021·Journal of Dentistry·Marta Revilla-León, Amirali Zandinejad
Jul 24, 2021·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Amirali Zandinejad, Marta Revilla-León

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